Oscillating motor-driven fan.



HfM. sHEpD. OSCILLATING MOTOR DRIVEN'FAN.

APPLICATION FILED NOV. 29,1909.

Patentd Aug. 8,1911.

. IAWITNESSEJS:

UNITED STATES PATENroFmioE;

HA aRY M. SHEDD, or ROSELLE, NEW JERSEY, ASSIGNOR TO WESTINGHOUSEELECTRIC & MANUFACTURING COMPANY, A coRPoRArroN or 'IPENNSYLVANIA;

oscILLnTINe MOTOR-DRIVEN FAN;

To vall whom it my concern:

Be it known that I," HARRY M. SHEDD, of

' the borough of Roselle, county of Union,

' shall be simple and compact in structure and effective in operation,and the oscillatory movements of which shall be effected by theexpenditure of a relatively smal amount of power.

In the accompanying drawing, Figure l is a view, partially in sideelevation and partially in section, of a fan embodying my invention,portions of the structure being also broken away. Fig. 2 is a sectionalview of a portion of the structure shown in Fig. 1.

The upper portion 2 of the base 1 of the fanais of cylindrical or cupform and in it is located a cylindrical block 3 of less externaldiameter than the internal diameter of the cup, the block 3 beingprovided with an inclined guide here shown as a groove 4 of helicalform, the respective ends of which are approximately 90 apart,t-hough'the form and length may be varied from what is shown, ifdesired. i

The bottom portion 5 of the fan motor body 6 rests upon a-suitablebearing member or shoulder 7 'at the top of the. cylindrical block 3 andis fastened in position by means of a bolt 8 which extends through acentral opening therein and also through corresponding holes in theblock 3 and the bottom of the cylindrical portion 2 of the. base.

A hole 9 is provided at one side of theportion 5 of the fan motor casingthrough which projects a bar 10, the lower end of which is provided witha roller 11 to fit into the cam groove 4 in the cylindricalblock 3. Theupper end of the bar 10 is provided with a similar roller 12 whichengages an annular groove 13 in the face of a disk 14, to be hereinaftermore fully described.

"The shaft 15 of the armature 16 of the Specification ofLetters Patent.Patented Aug; 8, 1911, Applicationfiled November 29, 1909. Serial No.536,504; 1

fan motor has suitable bearings at the ends v of thecasing 6 and uponits front end are mounted fan blades 17, a suitable guard 18 beingattached to the front end of the casing 6, as is usua in such devices.Loosely mounted upon the shaft 15, within the eas ing and between thefront end of the arms ture lo and the fan blades,is a gear wheel 19having a recessed rear side, the periphery of the recess being providedwith gear teeth to be engaged bya gear wheel 20 that is rotatablysupported upon a suitable bracket 21 with which, the casing 6 isprovided. The gear wheel 20 also meshes with a pinion 22 that is rigidlymounted upon a shaft- 15, the gear members 19, 20 and 22 being of suchrelative proportions that the motor may drive the member 19 atsuchreduced speed as may be desired.

The disk 14 is adjustably attached to the front face of the gearmember19 by means of thumb screws 23 and cooperating Sl)tS 24:, an in ermedate slot 25 being provided in the disk to receive the shaft 15. The disk14 may be adjusted along'the faceof the gear member 19 to bring it intoconcentric relation therewith, or it may be adjusted to any degree ofeccentricity, be tween the. extreme position shown in the drawing andthe point of concentric relation. by loosening the thumb screws 23 andmoving it until. the desired adjusted position is attained, when thethumb screws may be tightened.

When the parts are in the positions shown in the drawings. and the motoris in operation, the fan blades will be-revolved at high speed and, byreason of the reducing gearing 19, 20 'and 22, the disk 14 will beturned at; a greatly reduced speed. As the disk is turned, it willreciprocate the bar 10 longitudinally through a range which is dependentupon the degree of eccentricity to which it is adjusted, and, assidewise mowem: llc, the ba is prevented by-the opening 9 in which itloosely fits, the helical groove 4' will cause'the motor and fan to turnupon a vertical axis through such' an angle as will be determined by thecharacter It will be understood that any well known anddesired types ofbearings may be employed for the rotatable parts; that .thespeed-reducing gearing between the motor shaft and the disk l-t may bemodified as desired and that the cam elements pertaining to the parts 2,3, and 14F. may be modified in form and dimensions (as by substitutingprojections for recesses and vice versa) without departing from myinvention, it being merely essential that an eccentric operating surfaceshall be so combined with-an in-- 7 face and said cam surface to effectoscillatory movements of the fan body.

2. In a motor-driven fan, the combination witha stationarybase having ahelical cam surface, of a fan. motor pivotally mounted on said base, adisk eccentrically mounted upon the said motor and having an annularoperating surface, speed-reducing gearing between the motor shaft andsaid disk and a longitudinally.movable bar interposed be tween theannular operating surface on said disk and the helical cam surface ofsaid base.

3. In a motor-driven fan, the combination with a base having acylindrical part provided with a helical cam groove, of a fan 'motorpivotally mounted" upon said base, an eccentrically mounted disk havingan an nular groove, speed-reducing gearing be tween said disk and themotor shaft and a reciprocatory bar interposed between said cam grooveand the helical groove in said base.

4. In a motor-driven fan, the combination with a base having acup-shaped recess in its top and a cylindrical block mounted in saidrecess and provided with a helical cam groove, of a fan motor pivotallymounted upon said base, speed-reducing gearing, a disk having an annulargroove and adjustably mounted upon the slow-speed member of saidgearing, and a longitudinally movable bar having projections at its endsto respectively engage the-groove in said disk and the helical camgroove in said base.

5. In a motor-driven fan, the combination with a base having a helicalcai'n surface in its upper portion, of a fan motor pivotally mountedupon said base, a disk having an annular bearing surface, a connecting.bar mounted to permit longitudinal movement only and having its endsrespectively provided with means to engage said annular groove and saidcam surface, speed-reducing gearing between said disk and the shaft ofsaid motor and means for adjusting the eccentricity of said disk withreference to said motor shaft.

6. In a motor-driven fan, the combination \vith a base having acylindrical part provided \vithfan inclined guide surface, of a 'fanmotor pivotally mounted upon said base, speed-reducing gearing driven bythe shaft of said motor, a disk member eccentrically mounted upon theslow'speed member of said gearing'and having an annular operatingsurface, and a longitudinally movable bar, the respective ends of whichmake operative engagement with said guide --surface and said annularoperating. surface.

7. In a motor-driven fan, the combination with a base havingacylindrical part pro vided with an inclined guide surface, of a fanmotor pi votally mounted upon said base,

speed-reducing gearing driven by the shaft of said motor and having anoperating cam surface upon its slow-speed member and a longitudinallymovable member the respective ends of which make operative engagementwithsaid inclined-guide surface and said operating cam surface.

Signed at Roselle, New Jersey, this 27th day of November, 1909. v

' HARRY MLSHEDD.

\Vitnesscs:

Pnrnn L. UGI-IA'ITA, 'JNO. II. Dn Gnorr

